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do some computation with apints instead of ConstantInts.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59401 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-11-16 05:14:43 +00:00
parent ea065fbdd8
commit aa3e157845
1 changed files with 5 additions and 6 deletions
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11
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -3590,16 +3590,15 @@ Instruction *InstCombiner::FoldAndOfICmps(Instruction &I,
return 0; return 0;
// Ensure that the larger constant is on the RHS. // Ensure that the larger constant is on the RHS.
ICmpInst::Predicate GT; bool ShouldSwap;
if (ICmpInst::isSignedPredicate(LHSCC) || if (ICmpInst::isSignedPredicate(LHSCC) ||
(ICmpInst::isEquality(LHSCC) && (ICmpInst::isEquality(LHSCC) &&
ICmpInst::isSignedPredicate(RHSCC))) ICmpInst::isSignedPredicate(RHSCC)))
GT = ICmpInst::ICMP_SGT; ShouldSwap = LHSCst->getValue().sgt(RHSCst->getValue());
else else
GT = ICmpInst::ICMP_UGT; ShouldSwap = LHSCst->getValue().ugt(RHSCst->getValue());
Constant *Cmp = ConstantExpr::getICmp(GT, LHSCst, RHSCst); if (ShouldSwap) {
if (cast<ConstantInt>(Cmp)->getZExtValue()) {
std::swap(LHS, RHS); std::swap(LHS, RHS);
std::swap(LHSCst, RHSCst); std::swap(LHSCst, RHSCst);
std::swap(LHSCC, RHSCC); std::swap(LHSCC, RHSCC);